Abstract : The crystallization of BeH2 via compaction-fusion of amorphous pyrolytic material (Beane product) was investigated. Various metal fluorides as co-additives with lithium hydride reduced drastically the pressure required to crystallize Beane product in short times. At 2-3 wt % concentration of the metal fluoride, the pressure requirement was reduced by about 50%. Crystalline BeH2 seed in large concentration was effective for crystallizing Li-doped BeH2 at room temperature under high pressure. However, the effectiveness became progressively less with repeated cycling. Be metal, formed in situ also was an active crystallization catalyst at lower pressures. Gross crystallization was obtained without use of an extended temperature quench. Attempts to crystallize beryllium hydride via dissociation of tertiary amine complexes were unsuccessful. Both thermal and chemical dissociation methods were employed. The triethylamine and N-methylmorpholine complexes of BeH2 were successfully prepared for the first time. Hydrogenolysis of dialkylberyllium-tertiary amine complexes produced alkylberyllium hydride-amines as major products. Attempts to prepare a carbon monoxide adduct of BeH2 were unsuccessful. In the area of oxidizer chemistry, the rate of exchange between HNF2 and CD3OD was investigated by n.m.r. techniques. Over a narrow stoichiometry, the kinetics data followed a second order relationship, but at higher ratios of HNF2 to CD3OD no simple rate expression could be derived.